国内
https://www.liaoxuefeng.com/wiki/1252599548343744
一句话点评：廖雪峰，说人话，通俗易懂。
国外
https://www.baeldung.com/learn-spring-course
一句话点评：非常好的学习资料，全部都有demo。
中文版：https://www.kancloud.cn/apachecn/howtodoinjava-zh/1952521
https://www.tutorialspoint.com/java_nio/java_nio_quick_guide.htm
https://jenkov.com/tutorials/java-nio/overview.html
https://www.javatpoint.com/spring-aop-example
https://www.geeksforgeeks.org/spring-configuration-annotation-with-example/
https://www.java67.com/2013/02/10-examples-of-hashmap-in-java-programming-tutorial.html
https://javarevisited.blogspot.com/2012/05/what-is-bean-scope-in-spring-mvc.html#axzz7wIM8RrCM